Speaker box with amplifier



FIG. 1 is a perspective view of the front, top and right side of a speaker box with amplifier showing my new design;

FIG. 2 is a front view of thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view thereof, shown in its alternate position of use.

The broken line showing of the electronic device is for the purpose of illustrating environmental structure and forms no part of the claimed design. 

CLAIM The ornamental design for a speaker box with amplifier, as shown and described. 